Your pool filter is the unsung workhorse of your entire system — and when it starts to fail, the signs show up fast. Cloudy water, pressure spikes, and a pool that never quite looks clean are the most common red flags that your filter may be done rather than just dirty. Before you dump more chemicals in trying to solve a problem that chemicals can't fix, it's worth taking a closer look at the filter itself. In the Orlando heat, where pools run hard year-round, filters wear out faster than most people expect.
This is the big one. If you've checked your chemistry, shocked the pool, and the water still looks hazy or dull, a failing filter is often the culprit. A healthy filter removes fine particles — algae, debris, body oils, sunscreen — that chemicals alone can't clear. When the filter media breaks down or becomes channeled, water flows through without actually being filtered. We see this constantly, especially with cartridge filters that haven't been replaced in several years. If cleaning the filter no longer makes a visible difference in water clarity, the media is likely exhausted.
Your filter gauge tells you a lot. A clean, functioning filter runs within a normal pressure range — typically 8–15 PSI depending on your system, though your baseline may differ. Watch for two specific problems:
Neither extreme means your filter just needs a cleaning. If the pressure gauge is giving you wild readings cycle after cycle, the filter may be failing structurally.
Sand filters, cartridge filters, and DE filters all have different components, but the inspection principle is the same: take a look inside. Cracked filter grids, torn cartridge pleats, or broken laterals in a sand filter all allow unfiltered water to pass directly back into your pool. You might even notice DE powder or sand returning through the return jets — a clear sign that internal components have failed. This isn't something a backwash or rinse will fix. Once the physical structure is compromised, replacement is the only real solution.
Most cartridge filter elements last 1–3 years with proper care. DE filter grids can last longer, but the fabric degrades over time. Sand typically needs replacing every 5–7 years. In a Florida climate — where pools are used heavily, UV exposure is intense, and algae pressure is high — these timelines tend to run on the shorter end. If you're not sure how old your filter media is, that uncertainty alone is a reason to have it inspected. An aging filter working at reduced efficiency forces your pump to work harder, which raises energy costs and shortens equipment life across the board.
If any of these signs sound familiar, don't wait for a green pool or a pump failure to force the issue. Catching a failing filter early is almost always cheaper than dealing with the problems it causes down the line. Give Always Clear a call at (407) 794-3393 — our team can inspect your filter, walk you through your options, and get your pool back to where it should be.